Carbureter.



C. B. SMITH.

CARBURETER.

APPLICATlON FILED JULY 10, 1914.

Patented July 6, 1915.

- c units n. snrrrn, or nnu'rong onro, assran'oa or p narrow, onro.

3 same, reference being had to the accompanyous-HALF 'ro 'LouIs Momma,or

CARIBURETER.

7 Be it known that 1, CHARLES D. SMITH, a. citizen of the .UnitedStates, residing at Dayton, in the 'county'of Montgomery and State ofOhio, have invented certain new and useful Improvements in Carbureters;and l do declare the following to be a full, clear, and exactdescription of the invention, such.- as will enable others skilled inthe art to which it. appertains to make and use the ing .-drawings, and;to'the letters and figures 'of-reference' marked thereon, which form apart, offTthis-specifipation. v 1

'My .invention relates to certain improvements 'in. carbureters.

"l The-object of "the invention is to provide a eartareteataving certainstructural parts and arrangements whereby a maximum eiiiciency-i isbbtained and all requirements of a barbureter are sub erved' to adesired extent. To the' fore oirfg ends'the improvements relate to ausele-valve and the seat thereof, thelatter being adjustable relatively tothe valve, 1 y p 'The improvements further relate to a roitary valve andits. positionv relative to the tube'and through'which the primary fair aftted to lthe mixin tube is" controlled-and regulated. And the improve-.lmentsi further relate to the mounting of .the {float relative to theinlet valve which is con:

trolled -thereby,'al1 as will hereinafter more fully-be described,reference being had to the accompanying drawings of which- Figured is asectional elevation on the ,line li lofFig. 2; Fig. 2 is a sectionalview fon the line 272 of Fig. 1; Fig. 3 is .a sectiona-l view on theline 3-3 of Fig. 1; Fig. 4 I i is anenlarged detail elevation of theneedle-- *valve, adjustable therefor and adjunctive elements; 5 isasectional elevation of the automatic air-controlled valve, the

. needle-valve and the support for the latter;

Fig dis a detail view of the positive air controlled valve; Fig.7 is adetail view of the' valve seat ad usting devlce.

' in a detail description of the invention,

Specification of Letters Patent.

drawings.

Patented July it, 11915;

v Application filed July 10, 1914. Serial No. 850,249.

similar reference characters indicate corre sponding parts .in theseveral views of the The carbureter casing is constructed with a view ofaccommodating the various elements supported thereby and; containedtherein. A preferable form of such casing is here shownito consist of ashell 1, a mix ing tube 4, an air cylinder 15 and acap 2. The spacewithin said shell, between the wall 1' thereof and the tube 4, receivesthe fluid orgasolene, and therein islocateda segmental 'formof float 3to be again"referred to in connection with the main inlet valve throughwhich the fuel is admitted. The tube 4 provides a mixing chamber andpenetrating a side of said tube and extending from the float-chamberinto said mixing chamber is a tube 5. Upon the upper end of said tube5,2111 enlarged tubular member 6 is rigidly mounted upon which is adjustably supported a valve seat 7 which cooperates with a needle-valve14. There is a continuous passage through the-tube 5, its enlarge dextension 6, and the needle-valve seat7. On

- a sideof the needle-valve seat 7, a grooved block 19 is fixed withinwhich a slidable block 20- is mounted by means of a T slot. Engaging thelongitudinal slidable block 20 is a pin 21 which is eccentricallymounted in the end of'an' adjusting screw 22 which penetrates a side ofthe tube 4. The outer end of the adjusting screw 22 is provided with ahead 24 and oppositely arranged shoulders 25 the latter being'in aposition to engage a stop-pin 25 extending from a side of the tube 4-andthus limiting the turning movement of the screw 92. The needle-valveseat 7 is thus adjustable relative to aneedle-valve 14.- This valve 14is mounted on a crosshead 12 Which inturn is supported at the upperendsof posts 11 which extend down guide-plate 13 being suitably securedin the upper end of the mixing tube 4:.

The air valve 8 seats upon the upper end of a spider '31 that screwsinto the lower end of the mixing tube 4. A guide-pin 9 penetrates anapertured boss 32 of saidspider and also passes through the valve 8 andforms a guide for said valve.- A conical spring 10 is placed between thevalve 8 and a head 33 on the guide-pin 9, and by means of this springthe valve 8 is normally maintained upon 'its seat. The guide-pin 9screws through the apertured boss 32 and is, therefore, adjustable tovary, the tension ofthe spring 10.

' The primary. air inlet is controlled by a rotary valve 16 which ismounted in the cylinder 15 and has a spiral opening 17 extend.

ing longitudinally thereof which may communicate with an inlet port 34:which. in turn opens into the mixing tube 4. The rotary valve 16 isturned by means of a head :18 and is limited in its rotation by a pin 36which is so arranged as to engage a suitable.

portion of the cylinder 15.

The shell 1 has a lateral extension 1" into which an apertured plug 37screws the aperture in said .plug terminating in a vertical portion 27which is controlled by a valve 28 mounted in a support 38 extending fromthe inner extended portion of said plug 37. Also extending from theinner portion of said valve plug 37 is .a bifurcated extension 29between which'a float lever 30 is fulcrumedosaid lever being attached tothe float 3. The free end of the lever 30 extends over the end of thevalve 28 in a position to close the valve when the float; level assumesthe requisite position such as is shown in Fig. 1. lVhen the lever freesthe'said valve 28 by .the float falling to a lowerlevcl the said valve'is then under theinfluence 'of the incoming gasolene and the gasoleneflows into the float chamber until the requisite level is again attainedto shut ofi? the intake.

39 designates a collar screwed on to the outer end of the apertured plug37 by means of which a fuel inlet nozzle 40 is coupled with the member37.

It'will be observed that the apertured plug 37 is conveniently assembledin its operative position with the valve 28 in its position and theinner extension 29 of said plug in a convenient position for insertingthe pivot of the float lever 30. The needle-valve seat 7 1' is movableup or down within certain limits to form a proper opening for the fueladmission.

While I have described minutely the means for adjusting the needle-valveseat, I do not desire to limit myself to the specific means herein shownand described for it 1s obvious that other means than an eccentric andslidable block may be employed to effect such adjustment.

Having described my invention, I claim- 1. In a carburetor, thecombination with a shell providing a fuel receptacle and a mixingchamber, of an inlet valve controlling the admission of the fuel to saidinixing chamber, a seat member for said valve, and means extendinglaterally from said valve seat member to the exterior of the shell foradjusting said valve seat relatively to the valve. o

. 2. In a oarbureter, the combination with a shell providing a fuelchamber and a mixing chamber, of a pipe extending from the fuel chamberto the mixing chamber, a movable valve seat member supported on saidpipe within the mixing chamber, means extending laterally from saidvalve seat member to the exterior of the shell for adjusting said valveseat, and a valve cooperating with said seat and controllingtlieedinission of fuelto the mixing chamber.

3. In a carbureter,the combination with a shell providing a fuel chamberand a mixing'chainber, of an air valve controlling the admission of airinto the lower end of said chamber, a fuel admission valve connectedwith said air valve, a movable seat member cooperating with said fueladmission valve,

-a tube extending from the fuel chamber 'to operating with saidneedle-valve,f ineans for :IflJUSiZIIIg said valve seat memberrelatively to. the needle-valve, said means extending laterally from thevalve seat'member to the exterior of the shell, and a tube extendingfrom the fuel chamber to said valve seat.

5. In a carburetor, the combination with a shell providing a fuelchamber and a mixing chamber, an air valve mounted in the lower end ofsaid mixing chamber, posts extending from said air valve, a crossheadsupported.on-=the upper ends of said posts, a needle-valve supported onsaid crosshead, a

guide member through which said posts and needle-valve project, amovable seat member cooperating with said needle-valve, and meansfor-adjusting said movable valve seat member relatively to theneedle-valve cooperating therewith, comprising a slidable member mountedon the side of said valve seat member.

6D In a carbureter, the combination with 5 a shell providing'a fuelchamber and a mixing chamber, said mixing chamber having an elongatedair port ina side thereof, a cylinder mounted parallel with the mixingchamber and over said-air port, of a rotary 1e air valve mounted in saidcylinder parallel with said mixing chamber and having a spiral air porttherein adapted to partially register with the air port in the side ofthe mixing chamber. I

In testimony whereof I afiix my signature, 15 inpresence of twoWitnesses.

CHARLES D. SMITH. Witnesses:

R. 1]. MCOARTY, MATTHEW SIEBLER.

